Improvement in grain-separators



N. ALBROWN.

Grain-Separators.

Patented Oct- 6,1874.

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UNITED STATES PATENT OFFICE.

NATHAN M. BROWN, OF PESOADERO, CALIFORNIA, ASSIGNOR- OF ONE-HALF HIS RIGHT TO ALEXANDER MOORE, OF SAME PLACE.

IMPROVEMENT IN GR AlN-SEPARATORS.

Specification forming part of Letters Patent No. 155,?02, dated October 6,1874; application filed July 13,1874.

To all whom it may concern:

Be it known that I, NATHAN M. BROWN, of Pescadero, San Mateo county, State of California, have invented an Improved Riddle for Separators; and I do hereby declare the following description and accompanying drawings are sufficient to enable any person skilled in the art or science to which it most nearly appertains to make and use my said invention or improvement without further invention or experiment. 7

My invention relates to improvements in that class of riddles for separators in which two or more riddle-sections are hinged together and mounted inside of the separatori'rame, so as to have a back-and-forth motion, while the middle portion rises and falls in an 1 undulatory manner.

In order to explain my improvement so that others will be able to make and use the improved riddle, reference is had to the accompanying drawings forming a part of this specification, in which- Figure 1 is a perspective view of my invention. Fig. 2 is a section of a part of my device.

Let A represent a separator frame. The riddle I construct in two or more sections, B 0. Each section consists of a wooden frame, which is of the proper width to fit easily inside of the separator-frame. Across this frame I stretch parallel wires 0 c c, at a proper distance apart to form meshes or spaces between them of the desired size. I then connect these sections together by means of hinges c, or other suitable loose-jointed connection, so that the end of one screw will be below the other,

as represented, being careful to have the ends 7 of the sections at which the wires are secured to the bottom side of the frame, standing in the same direction. These connected sections I then secure inside of the separator-frame by suspending the extremity of one end section by means of link-hangersj from the sides of ing and lowering the hinged ends of the sec-' tions or middle of the riddle. A crank-wheel, 10, is secured to each end of the shaft 1, and a rod, 1', connects these cranks with the projecting ends of the rod k, which supports the rear end of the riddle. Thus it will be seen that by turning the shaft 1 the riddle will be moved back and forth longitudinally, and at the same time its hinged middle portion will be moved.

up and down so as to give the riddle an undulatory motion.

By hinging the end of one section below the I end of the adjoining section, I provide a drop for the straw and grain, which loosens up the straw and allows the grain to pass through the riddle.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

A riddle for grain-separators, composed of two or more sections, A B, hinged together, so that the end of one section will be above the other when suspended inside of the separator-frame by means of links j and rod 70, in combination with the shaft Z, with its cams O and crank-wheels p, connecting-rods k, substantially as and for the purpose above described.

In witness whereof I hereunto set my hand and seal.

NATHAN MARSTON BROWN. [L. 

